/Engine/Source/Runtime/AugmentedReality/Public/ARBlueprintLibrary.h
a list of all the real-world geometry of the specified class as currently seen by the Augmented Reality system
static [TArray](API\Runtime\Core\Containers\TArray)< [UARTrackedGeometry](API\Runtime\AugmentedReality\UARTrackedGeometry) * > GetAllGeometriesByClass ( [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UARTrackedGeometry](API\Runtime\AugmentedReality\UARTrackedGeometry) > GeometryClass )